3 * Copyright (c) 1987-1997 Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
16 #include "patchlevel.h"
18 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
23 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
24 char *getenv _((char *)); /* Usually in <stdlib.h> */
27 dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n";
35 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
45 curcop = &compiling; \
52 laststype = OP_STAT; \
54 maxsysfd = MAXSYSFD; \
61 laststype = OP_STAT; \
65 static void find_beginning _((void));
66 static void forbid_setid _((char *));
67 static void incpush _((char *, int));
68 static void init_ids _((void));
69 static void init_debugger _((void));
70 static void init_lexer _((void));
71 static void init_main_stash _((void));
73 static struct perl_thread * init_main_thread _((void));
74 #endif /* USE_THREADS */
75 static void init_perllib _((void));
76 static void init_postdump_symbols _((int, char **, char **));
77 static void init_predump_symbols _((void));
78 static void my_exit_jump _((void)) __attribute__((noreturn));
79 static void nuke_stacks _((void));
80 static void open_script _((char *, bool, SV *));
81 static void usage _((char *));
82 static void validate_suid _((char *, char*));
84 static int fdscript = -1;
86 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
87 #include <asm/sigcontext.h>
89 catch_sigsegv(int signo, struct sigcontext_struct sc)
91 signal(SIGSEGV, SIG_DFL);
92 fprintf(stderr, "Segmentation fault dereferencing 0x%lx\n"
93 "return_address = 0x%lx, eip = 0x%lx\n",
94 sc.cr2, __builtin_return_address(0), sc.eip);
95 fprintf(stderr, "thread = 0x%lx\n", (unsigned long)THR);
102 PerlInterpreter *sv_interp;
105 New(53, sv_interp, 1, PerlInterpreter);
110 perl_construct(register PerlInterpreter *sv_interp)
115 struct perl_thread *thr;
116 #endif /* FAKE_THREADS */
117 #endif /* USE_THREADS */
119 if (!(curinterp = sv_interp))
123 Zero(sv_interp, 1, PerlInterpreter);
126 /* Init the real globals (and main thread)? */
131 #ifdef ALLOC_THREAD_KEY
134 if (pthread_key_create(&thr_key, 0))
135 croak("panic: pthread_key_create");
137 MUTEX_INIT(&sv_mutex);
139 * Safe to use basic SV functions from now on (though
140 * not things like mortals or tainting yet).
142 MUTEX_INIT(&eval_mutex);
143 COND_INIT(&eval_cond);
144 MUTEX_INIT(&threads_mutex);
145 COND_INIT(&nthreads_cond);
147 thr = init_main_thread();
148 #endif /* USE_THREADS */
150 linestr = NEWSV(65,80);
151 sv_upgrade(linestr,SVt_PVIV);
153 if (!SvREADONLY(&sv_undef)) {
154 SvREADONLY_on(&sv_undef);
158 SvREADONLY_on(&sv_no);
160 sv_setpv(&sv_yes,Yes);
162 SvREADONLY_on(&sv_yes);
165 nrs = newSVpv("\n", 1);
166 rs = SvREFCNT_inc(nrs);
168 sighandlerp = sighandler;
173 * There is no way we can refer to them from Perl so close them to save
174 * space. The other alternative would be to provide STDAUX and STDPRN
177 (void)fclose(stdaux);
178 (void)fclose(stdprn);
184 perl_destruct_level = 1;
186 if(perl_destruct_level > 0)
191 lex_state = LEX_NOTPARSING;
193 start_env.je_prev = NULL;
194 start_env.je_ret = -1;
195 start_env.je_mustcatch = TRUE;
196 top_env = &start_env;
199 SET_NUMERIC_STANDARD();
200 #if defined(SUBVERSION) && SUBVERSION > 0
201 sprintf(patchlevel, "%7.5f", (double) 5
202 + ((double) PATCHLEVEL / (double) 1000)
203 + ((double) SUBVERSION / (double) 100000));
205 sprintf(patchlevel, "%5.3f", (double) 5 +
206 ((double) PATCHLEVEL / (double) 1000));
209 #if defined(LOCAL_PATCH_COUNT)
210 localpatches = local_patches; /* For possible -v */
213 PerlIO_init(); /* Hook to IO system */
215 fdpid = newAV(); /* for remembering popen pids by fd */
219 New(51,debname,128,char);
220 New(52,debdelim,128,char);
227 perl_destruct(register PerlInterpreter *sv_interp)
230 int destruct_level; /* 0=none, 1=full, 2=full with checks */
235 #endif /* USE_THREADS */
237 if (!(curinterp = sv_interp))
242 /* Pass 1 on any remaining threads: detach joinables, join zombies */
244 MUTEX_LOCK(&threads_mutex);
245 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
246 "perl_destruct: waiting for %d threads...\n",
248 for (t = thr->next; t != thr; t = t->next) {
249 MUTEX_LOCK(&t->mutex);
250 switch (ThrSTATE(t)) {
253 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
254 "perl_destruct: joining zombie %p\n", t));
255 ThrSETSTATE(t, THRf_DEAD);
256 MUTEX_UNLOCK(&t->mutex);
259 * The SvREFCNT_dec below may take a long time (e.g. av
260 * may contain an object scalar whose destructor gets
261 * called) so we have to unlock threads_mutex and start
264 MUTEX_UNLOCK(&threads_mutex);
266 SvREFCNT_dec((SV*)av);
267 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
268 "perl_destruct: joined zombie %p OK\n", t));
270 case THRf_R_JOINABLE:
271 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
272 "perl_destruct: detaching thread %p\n", t));
273 ThrSETSTATE(t, THRf_R_DETACHED);
275 * We unlock threads_mutex and t->mutex in the opposite order
276 * from which we locked them just so that DETACH won't
277 * deadlock if it panics. It's only a breach of good style
278 * not a bug since they are unlocks not locks.
280 MUTEX_UNLOCK(&threads_mutex);
282 MUTEX_UNLOCK(&t->mutex);
285 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
286 "perl_destruct: ignoring %p (state %u)\n",
288 MUTEX_UNLOCK(&t->mutex);
289 /* fall through and out */
292 /* We leave the above "Pass 1" loop with threads_mutex still locked */
294 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
297 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
298 "perl_destruct: final wait for %d threads\n",
300 COND_WAIT(&nthreads_cond, &threads_mutex);
302 /* At this point, we're the last thread */
303 MUTEX_UNLOCK(&threads_mutex);
304 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
305 MUTEX_DESTROY(&threads_mutex);
306 COND_DESTROY(&nthreads_cond);
307 #endif /* !defined(FAKE_THREADS) */
308 #endif /* USE_THREADS */
310 destruct_level = perl_destruct_level;
314 if (s = getenv("PERL_DESTRUCT_LEVEL")) {
316 if (destruct_level < i)
325 /* We must account for everything. */
327 /* Destroy the main CV and syntax tree */
329 curpad = AvARRAY(comppad);
334 SvREFCNT_dec(main_cv);
339 * Try to destruct global references. We do this first so that the
340 * destructors and destructees still exist. Some sv's might remain.
341 * Non-referenced objects are on their own.
348 /* unhook hooks which will soon be, or use, destroyed data */
349 SvREFCNT_dec(warnhook);
351 SvREFCNT_dec(diehook);
353 SvREFCNT_dec(parsehook);
356 if (destruct_level == 0){
358 DEBUG_P(debprofdump());
360 /* The exit() function will do everything that needs doing. */
364 /* loosen bonds of global variables */
367 (void)PerlIO_close(rsfp);
371 /* Filters for program text */
372 SvREFCNT_dec(rsfp_filters);
373 rsfp_filters = Nullav;
385 sawampersand = FALSE; /* must save all match strings */
386 sawstudy = FALSE; /* do fbm_instr on all strings */
401 /* magical thingies */
403 Safefree(ofs); /* $, */
406 Safefree(ors); /* $\ */
409 SvREFCNT_dec(nrs); /* $\ helper */
412 multiline = 0; /* $* */
414 SvREFCNT_dec(statname);
418 /* defgv, aka *_ should be taken care of elsewhere */
420 /* clean up after study() */
421 SvREFCNT_dec(lastscream);
423 Safefree(screamfirst);
425 Safefree(screamnext);
428 /* startup and shutdown function lists */
429 SvREFCNT_dec(beginav);
431 SvREFCNT_dec(initav);
436 /* temp stack during pp_sort() */
437 SvREFCNT_dec(sortstack);
440 /* shortcuts just get cleared */
450 /* reset so print() ends up where we expect */
453 /* Prepare to destruct main symbol table. */
460 if (destruct_level >= 2) {
461 if (scopestack_ix != 0)
462 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
463 (long)scopestack_ix);
464 if (savestack_ix != 0)
465 warn("Unbalanced saves: %ld more saves than restores\n",
467 if (tmps_floor != -1)
468 warn("Unbalanced tmps: %ld more allocs than frees\n",
469 (long)tmps_floor + 1);
470 if (cxstack_ix != -1)
471 warn("Unbalanced context: %ld more PUSHes than POPs\n",
472 (long)cxstack_ix + 1);
475 /* Now absolutely destruct everything, somehow or other, loops or no. */
477 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
478 while (sv_count != 0 && sv_count != last_sv_count) {
479 last_sv_count = sv_count;
482 SvFLAGS(strtab) &= ~SVTYPEMASK;
483 SvFLAGS(strtab) |= SVt_PVHV;
485 /* Destruct the global string table. */
487 /* Yell and reset the HeVAL() slots that are still holding refcounts,
488 * so that sv_free() won't fail on them.
497 array = HvARRAY(strtab);
501 warn("Unbalanced string table refcount: (%d) for \"%s\"",
502 HeVAL(hent) - Nullsv, HeKEY(hent));
503 HeVAL(hent) = Nullsv;
513 SvREFCNT_dec(strtab);
516 warn("Scalars leaked: %ld\n", (long)sv_count);
520 /* No SVs have survived, need to clean out */
524 Safefree(origfilename);
526 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
528 DEBUG_P(debprofdump());
530 MUTEX_DESTROY(&sv_mutex);
531 MUTEX_DESTROY(&eval_mutex);
532 COND_DESTROY(&eval_cond);
534 /* As the penultimate thing, free the non-arena SV for thrsv */
535 Safefree(SvPVX(thrsv));
536 Safefree(SvANY(thrsv));
539 #endif /* USE_THREADS */
541 /* As the absolutely last thing, free the non-arena SV for mess() */
544 /* we know that type >= SVt_PV */
546 Safefree(SvPVX(mess_sv));
547 Safefree(SvANY(mess_sv));
554 perl_free(PerlInterpreter *sv_interp)
556 if (!(curinterp = sv_interp))
562 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
567 char *scriptname = NULL;
568 VOL bool dosearch = FALSE;
575 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
578 croak("suidperl is no longer needed since the kernel can now execute\n\
579 setuid perl scripts securely.\n");
583 if (!(curinterp = sv_interp))
586 #if defined(NeXT) && defined(__DYNAMIC__)
587 _dyld_lookup_and_bind
588 ("__environ", (unsigned long *) &environ_pointer, NULL);
593 #ifndef VMS /* VMS doesn't have environ array */
594 origenviron = environ;
600 /* Come here if running an undumped a.out. */
602 origfilename = savepv(argv[0]);
604 cxstack_ix = -1; /* start label stack again */
606 init_postdump_symbols(argc,argv,env);
611 curpad = AvARRAY(comppad);
616 SvREFCNT_dec(main_cv);
620 oldscope = scopestack_ix;
628 /* my_exit() was called */
629 while (scopestack_ix > oldscope)
634 call_list(oldscope, endav);
636 return STATUS_NATIVE_EXPORT;
639 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
643 sv_setpvn(linestr,"",0);
644 sv = newSVpv("",0); /* first used for -I flags */
648 for (argc--,argv++; argc > 0; argc--,argv++) {
649 if (argv[0][0] != '-' || !argv[0][1])
653 validarg = " PHOOEY ";
678 if (s = moreswitches(s))
688 if (euid != uid || egid != gid)
689 croak("No -e allowed in setuid scripts");
691 e_tmpname = savepv(TMPPATH);
692 (void)mktemp(e_tmpname);
694 croak("Can't mktemp()");
695 e_fp = PerlIO_open(e_tmpname,"w");
697 croak("Cannot open temporary file");
702 PerlIO_puts(e_fp,argv[1]);
706 croak("No code specified for -e");
707 (void)PerlIO_putc(e_fp,'\n');
709 case 'I': /* -I handled both here and in moreswitches() */
711 if (!*++s && (s=argv[1]) != Nullch) {
714 while (s && isSPACE(*s))
718 for (e = s; *e && !isSPACE(*e); e++) ;
725 } /* XXX else croak? */
739 preambleav = newAV();
740 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
742 Sv = newSVpv("print myconfig();",0);
744 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
746 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
748 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
749 sv_catpv(Sv,"\" Compile-time options:");
751 sv_catpv(Sv," DEBUGGING");
754 sv_catpv(Sv," NO_EMBED");
757 sv_catpv(Sv," MULTIPLICITY");
759 sv_catpv(Sv,"\\n\",");
761 #if defined(LOCAL_PATCH_COUNT)
762 if (LOCAL_PATCH_COUNT > 0) {
764 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
765 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
767 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
771 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
774 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
776 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
781 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
782 print \" \\%ENV:\\n @env\\n\" if @env; \
783 print \" \\@INC:\\n @INC\\n\";");
786 Sv = newSVpv("config_vars(qw(",0);
791 av_push(preambleav, Sv);
792 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
803 if (!*++s || isSPACE(*s)) {
807 /* catch use of gnu style long options */
808 if (strEQ(s, "version")) {
812 if (strEQ(s, "help")) {
819 croak("Unrecognized switch: -%s (-h will show valid options)",s);
824 if (!tainting && (s = getenv("PERL5OPT"))) {
835 if (!strchr("DIMUdmw", *s))
836 croak("Illegal switch in PERL5OPT: -%c", *s);
842 scriptname = argv[0];
844 if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp)) {
846 warn("Did you forget to compile with -DMULTIPLICITY?");
848 croak("Can't write to temp file for -e: %s", Strerror(errno));
852 scriptname = e_tmpname;
854 else if (scriptname == Nullch) {
856 if ( isatty(PerlIO_fileno(PerlIO_stdin())) )
864 open_script(scriptname,dosearch,sv);
866 validate_suid(validarg, scriptname);
871 main_cv = compcv = (CV*)NEWSV(1104,0);
872 sv_upgrade((SV *)compcv, SVt_PVCV);
876 av_push(comppad, Nullsv);
877 curpad = AvARRAY(comppad);
878 comppad_name = newAV();
879 comppad_name_fill = 0;
880 min_intro_pending = 0;
883 av_store(comppad_name, 0, newSVpv("@_", 2));
884 curpad[0] = (SV*)newAV();
885 SvPADMY_on(curpad[0]); /* XXX Needed? */
887 New(666, CvMUTEXP(compcv), 1, perl_mutex);
888 MUTEX_INIT(CvMUTEXP(compcv));
889 #endif /* USE_THREADS */
891 comppadlist = newAV();
892 AvREAL_off(comppadlist);
893 av_store(comppadlist, 0, (SV*)comppad_name);
894 av_store(comppadlist, 1, (SV*)comppad);
895 CvPADLIST(compcv) = comppadlist;
897 boot_core_UNIVERSAL();
899 (*xsinit)(); /* in case linked C routines want magical variables */
900 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
904 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
905 DEBUG_L(signal(SIGSEGV, (void(*)(int))catch_sigsegv););
908 init_predump_symbols();
910 init_postdump_symbols(argc,argv,env);
914 /* now parse the script */
916 SETERRNO(0,SS$_NORMAL);
918 if (yyparse() || error_count) {
920 croak("%s had compilation errors.\n", origfilename);
922 croak("Execution of %s aborted due to compilation errors.\n",
926 curcop->cop_line = 0;
930 (void)UNLINK(e_tmpname);
935 /* now that script is parsed, we can modify record separator */
937 rs = SvREFCNT_inc(nrs);
939 sv_setsv(THREADSV(find_threadsv("/")), rs);
941 sv_setsv(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), rs);
942 #endif /* USE_THREADS */
953 if ((s=getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
954 dump_mstats("after compilation:");
964 perl_run(PerlInterpreter *sv_interp)
971 if (!(curinterp = sv_interp))
974 oldscope = scopestack_ix;
979 cxstack_ix = -1; /* start context stack again */
982 /* my_exit() was called */
983 while (scopestack_ix > oldscope)
988 call_list(oldscope, endav);
990 if (getenv("PERL_DEBUG_MSTATS"))
991 dump_mstats("after execution: ");
994 return STATUS_NATIVE_EXPORT;
997 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1002 if (curstack != mainstack) {
1004 SWITCHSTACK(curstack, mainstack);
1009 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1010 sawampersand ? "Enabling" : "Omitting"));
1013 DEBUG_x(dump_all());
1014 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1016 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1017 (unsigned long) thr));
1018 #endif /* USE_THREADS */
1021 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1024 if (PERLDB_SINGLE && DBsingle)
1025 sv_setiv(DBsingle, 1);
1027 call_list(oldscope, initav);
1037 else if (main_start) {
1038 CvDEPTH(main_cv) = 1;
1049 perl_get_sv(char *name, I32 create)
1053 if (name[1] == '\0' && !isALPHA(name[0])) {
1054 PADOFFSET tmp = find_threadsv(name);
1055 if (tmp != NOT_IN_PAD) {
1057 return THREADSV(tmp);
1060 #endif /* USE_THREADS */
1061 gv = gv_fetchpv(name, create, SVt_PV);
1068 perl_get_av(char *name, I32 create)
1070 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1079 perl_get_hv(char *name, I32 create)
1081 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1090 perl_get_cv(char *name, I32 create)
1092 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1093 if (create && !GvCVu(gv))
1094 return newSUB(start_subparse(FALSE, 0),
1095 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1103 /* Be sure to refetch the stack pointer after calling these routines. */
1106 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1108 /* See G_* flags in cop.h */
1109 /* null terminated arg list */
1116 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1121 return perl_call_pv(sub_name, flags);
1125 perl_call_pv(char *sub_name, I32 flags)
1126 /* name of the subroutine */
1127 /* See G_* flags in cop.h */
1129 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1133 perl_call_method(char *methname, I32 flags)
1134 /* name of the subroutine */
1135 /* See G_* flags in cop.h */
1141 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1144 return perl_call_sv(*stack_sp--, flags);
1147 /* May be called with any of a CV, a GV, or an SV containing the name. */
1149 perl_call_sv(SV *sv, I32 flags)
1151 /* See G_* flags in cop.h */
1154 LOGOP myop; /* fake syntax tree node */
1160 bool oldcatch = CATCH_GET;
1165 if (flags & G_DISCARD) {
1170 Zero(&myop, 1, LOGOP);
1171 myop.op_next = Nullop;
1172 if (!(flags & G_NOARGS))
1173 myop.op_flags |= OPf_STACKED;
1174 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1175 (flags & G_ARRAY) ? OPf_WANT_LIST :
1180 EXTEND(stack_sp, 1);
1183 oldscope = scopestack_ix;
1185 if (PERLDB_SUB && curstash != debstash
1186 /* Handle first BEGIN of -d. */
1187 && (DBcv || (DBcv = GvCV(DBsub)))
1188 /* Try harder, since this may have been a sighandler, thus
1189 * curstash may be meaningless. */
1190 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash))
1191 op->op_private |= OPpENTERSUB_DB;
1193 if (flags & G_EVAL) {
1194 cLOGOP->op_other = op;
1196 /* we're trying to emulate pp_entertry() here */
1198 register PERL_CONTEXT *cx;
1199 I32 gimme = GIMME_V;
1204 push_return(op->op_next);
1205 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1207 eval_root = op; /* Only needed so that goto works right. */
1210 if (flags & G_KEEPERR)
1225 /* my_exit() was called */
1226 curstash = defstash;
1230 croak("Callback called exit");
1239 stack_sp = stack_base + oldmark;
1240 if (flags & G_ARRAY)
1244 *++stack_sp = &sv_undef;
1252 if (op == (OP*)&myop)
1253 op = pp_entersub(ARGS);
1256 retval = stack_sp - (stack_base + oldmark);
1257 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1261 if (flags & G_EVAL) {
1262 if (scopestack_ix > oldscope) {
1266 register PERL_CONTEXT *cx;
1278 CATCH_SET(oldcatch);
1280 if (flags & G_DISCARD) {
1281 stack_sp = stack_base + oldmark;
1290 /* Eval a string. The G_EVAL flag is always assumed. */
1293 perl_eval_sv(SV *sv, I32 flags)
1295 /* See G_* flags in cop.h */
1298 UNOP myop; /* fake syntax tree node */
1300 I32 oldmark = sp - stack_base;
1307 if (flags & G_DISCARD) {
1315 EXTEND(stack_sp, 1);
1317 oldscope = scopestack_ix;
1319 if (!(flags & G_NOARGS))
1320 myop.op_flags = OPf_STACKED;
1321 myop.op_next = Nullop;
1322 myop.op_type = OP_ENTEREVAL;
1323 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1324 (flags & G_ARRAY) ? OPf_WANT_LIST :
1326 if (flags & G_KEEPERR)
1327 myop.op_flags |= OPf_SPECIAL;
1337 /* my_exit() was called */
1338 curstash = defstash;
1342 croak("Callback called exit");
1351 stack_sp = stack_base + oldmark;
1352 if (flags & G_ARRAY)
1356 *++stack_sp = &sv_undef;
1361 if (op == (OP*)&myop)
1362 op = pp_entereval(ARGS);
1365 retval = stack_sp - (stack_base + oldmark);
1366 if (!(flags & G_KEEPERR))
1371 if (flags & G_DISCARD) {
1372 stack_sp = stack_base + oldmark;
1382 perl_eval_pv(char *p, I32 croak_on_error)
1385 SV* sv = newSVpv(p, 0);
1388 perl_eval_sv(sv, G_SCALAR);
1395 if (croak_on_error && SvTRUE(ERRSV))
1396 croak(SvPVx(ERRSV, na));
1401 /* Require a module. */
1404 perl_require_pv(char *pv)
1406 SV* sv = sv_newmortal();
1407 sv_setpv(sv, "require '");
1410 perl_eval_sv(sv, G_DISCARD);
1414 magicname(char *sym, char *name, I32 namlen)
1418 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1419 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1423 usage(char *name) /* XXX move this out into a module ? */
1426 /* This message really ought to be max 23 lines.
1427 * Removed -h because the user already knows that opton. Others? */
1429 static char *usage[] = {
1430 "-0[octal] specify record separator (\\0, if no argument)",
1431 "-a autosplit mode with -n or -p (splits $_ into @F)",
1432 "-c check syntax only (runs BEGIN and END blocks)",
1433 "-d[:debugger] run scripts under debugger",
1434 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1435 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1436 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1437 "-i[extension] edit <> files in place (make backup if extension supplied)",
1438 "-Idirectory specify @INC/#include directory (may be used more than once)",
1439 "-l[octal] enable line ending processing, specifies line terminator",
1440 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1441 "-n assume 'while (<>) { ... }' loop around your script",
1442 "-p assume loop like -n but print line also like sed",
1443 "-P run script through C preprocessor before compilation",
1444 "-s enable some switch parsing for switches after script name",
1445 "-S look for the script using PATH environment variable",
1446 "-T turn on tainting checks",
1447 "-u dump core after parsing script",
1448 "-U allow unsafe operations",
1449 "-v print version number and patchlevel of perl",
1450 "-V[:variable] print perl configuration information",
1451 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1452 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1458 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1460 printf("\n %s", *p++);
1463 /* This routine handles any switches that can be given during run */
1466 moreswitches(char *s)
1475 rschar = scan_oct(s, 4, &numlen);
1477 if (rschar & ~((U8)~0))
1479 else if (!rschar && numlen >= 2)
1480 nrs = newSVpv("", 0);
1483 nrs = newSVpv(&ch, 1);
1489 splitstr = savepv(s + 1);
1503 if (*s == ':' || *s == '=') {
1504 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1508 perldb = PERLDB_ALL;
1515 if (isALPHA(s[1])) {
1516 static char debopts[] = "psltocPmfrxuLHXD";
1519 for (s++; *s && (d = strchr(debopts,*s)); s++)
1520 debug |= 1 << (d - debopts);
1524 for (s++; isDIGIT(*s); s++) ;
1526 debug |= 0x80000000;
1528 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1529 for (s++; isALNUM(*s); s++) ;
1539 inplace = savepv(s+1);
1541 for (s = inplace; *s && !isSPACE(*s); s++) ;
1545 case 'I': /* -I handled both here and in parse_perl() */
1548 while (*s && isSPACE(*s))
1552 for (e = s; *e && !isSPACE(*e); e++) ;
1553 p = savepvn(s, e-s);
1559 croak("No space allowed after -I");
1569 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1579 ors = SvPV(nrs, orslen);
1580 ors = savepvn(ors, orslen);
1584 forbid_setid("-M"); /* XXX ? */
1587 forbid_setid("-m"); /* XXX ? */
1592 /* -M-foo == 'no foo' */
1593 if (*s == '-') { use = "no "; ++s; }
1594 sv = newSVpv(use,0);
1596 /* We allow -M'Module qw(Foo Bar)' */
1597 while(isALNUM(*s) || *s==':') ++s;
1599 sv_catpv(sv, start);
1600 if (*(start-1) == 'm') {
1602 croak("Can't use '%c' after -mname", *s);
1603 sv_catpv( sv, " ()");
1606 sv_catpvn(sv, start, s-start);
1607 sv_catpv(sv, " split(/,/,q{");
1612 if (preambleav == NULL)
1613 preambleav = newAV();
1614 av_push(preambleav, sv);
1617 croak("No space allowed after -%c", *(s-1));
1634 croak("Too late for \"-T\" option");
1646 #if defined(SUBVERSION) && SUBVERSION > 0
1647 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1648 PATCHLEVEL, SUBVERSION, ARCHNAME);
1650 printf("\nThis is perl, version %s built for %s",
1651 patchlevel, ARCHNAME);
1653 #if defined(LOCAL_PATCH_COUNT)
1654 if (LOCAL_PATCH_COUNT > 0)
1655 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1656 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1659 printf("\n\nCopyright 1987-1997, Larry Wall\n");
1661 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1664 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1665 printf("djgpp v2 port (perl5004) by Laszlo Molnar, 1997\n");
1668 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1669 "Version 5 port Copyright (c) 1994-1997, Andreas Kaiser, Ilya Zakharevich\n");
1672 printf("atariST series port, ++jrb bammi@cadence.com\n");
1675 Perl may be copied only under the terms of either the Artistic License or the\n\
1676 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n");
1684 if (s[1] == '-') /* Additional switches on #! line. */
1695 #ifdef ALTERNATE_SHEBANG
1696 case 'S': /* OS/2 needs -S on "extproc" line. */
1704 croak("Can't emulate -%.1s on #! line",s);
1709 /* compliments of Tom Christiansen */
1711 /* unexec() can be found in the Gnu emacs distribution */
1722 prog = newSVpv(BIN_EXP);
1723 sv_catpv(prog, "/perl");
1724 file = newSVpv(origfilename);
1725 sv_catpv(file, ".perldump");
1727 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1729 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1730 SvPVX(prog), SvPVX(file));
1734 # include <lib$routines.h>
1735 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1737 ABORT(); /* for use with undump */
1743 init_main_stash(void)
1748 /* Note that strtab is a rather special HV. Assumptions are made
1749 about not iterating on it, and not adding tie magic to it.
1750 It is properly deallocated in perl_destruct() */
1752 HvSHAREKEYS_off(strtab); /* mandatory */
1753 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1754 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1756 curstash = defstash = newHV();
1757 curstname = newSVpv("main",4);
1758 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1759 SvREFCNT_dec(GvHV(gv));
1760 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1762 HvNAME(defstash) = savepv("main");
1763 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1765 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1766 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1768 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1769 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1770 sv_setpvn(ERRSV, "", 0);
1771 curstash = defstash;
1772 compiling.cop_stash = defstash;
1773 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1774 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1775 /* We must init $/ before switches are processed. */
1776 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1779 #ifdef CAN_PROTOTYPE
1781 open_script(char *scriptname, bool dosearch, SV *sv)
1784 open_script(scriptname,dosearch,sv)
1791 char *xfound = Nullch;
1792 char *xfailed = Nullch;
1796 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
1797 # define SEARCH_EXTS ".bat", ".cmd", NULL
1798 # define MAX_EXT_LEN 4
1801 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
1802 # define MAX_EXT_LEN 4
1805 # define SEARCH_EXTS ".pl", ".com", NULL
1806 # define MAX_EXT_LEN 4
1808 /* additional extensions to try in each dir if scriptname not found */
1810 char *ext[] = { SEARCH_EXTS };
1811 int extidx = 0, i = 0;
1812 char *curext = Nullch;
1814 # define MAX_EXT_LEN 0
1818 * If dosearch is true and if scriptname does not contain path
1819 * delimiters, search the PATH for scriptname.
1821 * If SEARCH_EXTS is also defined, will look for each
1822 * scriptname{SEARCH_EXTS} whenever scriptname is not found
1823 * while searching the PATH.
1825 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
1826 * proceeds as follows:
1827 * If DOSISH or VMSISH:
1828 * + look for ./scriptname{,.foo,.bar}
1829 * + search the PATH for scriptname{,.foo,.bar}
1832 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
1833 * this will not look in '.' if it's not in the PATH)
1837 # ifdef ALWAYS_DEFTYPES
1838 len = strlen(scriptname);
1839 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
1840 int hasdir, idx = 0, deftypes = 1;
1843 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
1846 int hasdir, idx = 0, deftypes = 1;
1849 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
1851 /* The first time through, just add SEARCH_EXTS to whatever we
1852 * already have, so we can check for default file types. */
1854 (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) )
1860 if ((strlen(tokenbuf) + strlen(scriptname)
1861 + MAX_EXT_LEN) >= sizeof tokenbuf)
1862 continue; /* don't search dir with too-long name */
1863 strcat(tokenbuf, scriptname);
1867 if (strEQ(scriptname, "-"))
1869 if (dosearch) { /* Look in '.' first. */
1870 char *cur = scriptname;
1872 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
1874 if (strEQ(ext[i++],curext)) {
1875 extidx = -1; /* already has an ext */
1880 DEBUG_p(PerlIO_printf(Perl_debug_log,
1881 "Looking for %s\n",cur));
1882 if (Stat(cur,&statbuf) >= 0) {
1890 if (cur == scriptname) {
1891 len = strlen(scriptname);
1892 if (len+MAX_EXT_LEN+1 >= sizeof(tokenbuf))
1894 cur = strcpy(tokenbuf, scriptname);
1896 } while (extidx >= 0 && ext[extidx] /* try an extension? */
1897 && strcpy(tokenbuf+len, ext[extidx++]));
1902 if (dosearch && !strchr(scriptname, '/')
1904 && !strchr(scriptname, '\\')
1906 && (s = getenv("PATH"))) {
1909 bufend = s + strlen(s);
1910 while (s < bufend) {
1911 #if defined(atarist) || defined(DOSISH)
1916 && *s != ';'; len++, s++) {
1917 if (len < sizeof tokenbuf)
1920 if (len < sizeof tokenbuf)
1921 tokenbuf[len] = '\0';
1922 #else /* ! (atarist || DOSISH) */
1923 s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf, s, bufend,
1926 #endif /* ! (atarist || DOSISH) */
1929 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tokenbuf)
1930 continue; /* don't search dir with too-long name */
1932 #if defined(atarist) || defined(DOSISH)
1933 && tokenbuf[len - 1] != '/'
1934 && tokenbuf[len - 1] != '\\'
1937 tokenbuf[len++] = '/';
1938 if (len == 2 && tokenbuf[0] == '.')
1940 (void)strcpy(tokenbuf + len, scriptname);
1944 len = strlen(tokenbuf);
1945 if (extidx > 0) /* reset after previous loop */
1949 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
1950 retval = Stat(tokenbuf,&statbuf);
1952 } while ( retval < 0 /* not there */
1953 && extidx>=0 && ext[extidx] /* try an extension? */
1954 && strcpy(tokenbuf+len, ext[extidx++])
1959 if (S_ISREG(statbuf.st_mode)
1960 && cando(S_IRUSR,TRUE,&statbuf)
1962 && cando(S_IXUSR,TRUE,&statbuf)
1966 xfound = tokenbuf; /* bingo! */
1970 xfailed = savepv(tokenbuf);
1973 if (!xfound && !seen_dot && !xfailed && (Stat(scriptname,&statbuf) < 0))
1975 seen_dot = 1; /* Disable message. */
1977 croak("Can't %s %s%s%s",
1978 (xfailed ? "execute" : "find"),
1979 (xfailed ? xfailed : scriptname),
1980 (xfailed ? "" : " on PATH"),
1981 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
1984 scriptname = xfound;
1987 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1988 char *s = scriptname + 8;
1997 origfilename = savepv(e_tmpname ? "-e" : scriptname);
1998 curcop->cop_filegv = gv_fetchfile(origfilename);
1999 if (strEQ(origfilename,"-"))
2001 if (fdscript >= 0) {
2002 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
2003 #if defined(HAS_FCNTL) && defined(F_SETFD)
2005 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2008 else if (preprocess) {
2009 char *cpp_cfg = CPPSTDIN;
2010 SV *cpp = NEWSV(0,0);
2011 SV *cmd = NEWSV(0,0);
2013 if (strEQ(cpp_cfg, "cppstdin"))
2014 sv_catpvf(cpp, "%s/", BIN_EXP);
2015 sv_catpv(cpp, cpp_cfg);
2018 sv_catpv(sv,PRIVLIB_EXP);
2022 sed %s -e \"/^[^#]/b\" \
2023 -e \"/^#[ ]*include[ ]/b\" \
2024 -e \"/^#[ ]*define[ ]/b\" \
2025 -e \"/^#[ ]*if[ ]/b\" \
2026 -e \"/^#[ ]*ifdef[ ]/b\" \
2027 -e \"/^#[ ]*ifndef[ ]/b\" \
2028 -e \"/^#[ ]*else/b\" \
2029 -e \"/^#[ ]*elif[ ]/b\" \
2030 -e \"/^#[ ]*undef[ ]/b\" \
2031 -e \"/^#[ ]*endif/b\" \
2034 (doextract ? "-e \"1,/^#/d\n\"" : ""),
2037 %s %s -e '/^[^#]/b' \
2038 -e '/^#[ ]*include[ ]/b' \
2039 -e '/^#[ ]*define[ ]/b' \
2040 -e '/^#[ ]*if[ ]/b' \
2041 -e '/^#[ ]*ifdef[ ]/b' \
2042 -e '/^#[ ]*ifndef[ ]/b' \
2043 -e '/^#[ ]*else/b' \
2044 -e '/^#[ ]*elif[ ]/b' \
2045 -e '/^#[ ]*undef[ ]/b' \
2046 -e '/^#[ ]*endif/b' \
2054 (doextract ? "-e '1,/^#/d\n'" : ""),
2056 scriptname, cpp, sv, CPPMINUS);
2058 #ifdef IAMSUID /* actually, this is caught earlier */
2059 if (euid != uid && !euid) { /* if running suidperl */
2061 (void)seteuid(uid); /* musn't stay setuid root */
2064 (void)setreuid((Uid_t)-1, uid);
2066 #ifdef HAS_SETRESUID
2067 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2073 if (geteuid() != uid)
2074 croak("Can't do seteuid!\n");
2076 #endif /* IAMSUID */
2077 rsfp = my_popen(SvPVX(cmd), "r");
2081 else if (!*scriptname) {
2082 forbid_setid("program input from stdin");
2083 rsfp = PerlIO_stdin();
2086 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2087 #if defined(HAS_FCNTL) && defined(F_SETFD)
2089 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2097 #ifndef IAMSUID /* in case script is not readable before setuid */
2098 if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2099 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2101 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2102 croak("Can't do setuid\n");
2106 croak("Can't open perl script \"%s\": %s\n",
2107 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2112 validate_suid(char *validarg, char *scriptname)
2116 /* do we need to emulate setuid on scripts? */
2118 /* This code is for those BSD systems that have setuid #! scripts disabled
2119 * in the kernel because of a security problem. Merely defining DOSUID
2120 * in perl will not fix that problem, but if you have disabled setuid
2121 * scripts in the kernel, this will attempt to emulate setuid and setgid
2122 * on scripts that have those now-otherwise-useless bits set. The setuid
2123 * root version must be called suidperl or sperlN.NNN. If regular perl
2124 * discovers that it has opened a setuid script, it calls suidperl with
2125 * the same argv that it had. If suidperl finds that the script it has
2126 * just opened is NOT setuid root, it sets the effective uid back to the
2127 * uid. We don't just make perl setuid root because that loses the
2128 * effective uid we had before invoking perl, if it was different from the
2131 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2132 * be defined in suidperl only. suidperl must be setuid root. The
2133 * Configure script will set this up for you if you want it.
2140 if (Fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2141 croak("Can't stat script \"%s\"",origfilename);
2142 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2146 #ifndef HAS_SETREUID
2147 /* On this access check to make sure the directories are readable,
2148 * there is actually a small window that the user could use to make
2149 * filename point to an accessible directory. So there is a faint
2150 * chance that someone could execute a setuid script down in a
2151 * non-accessible directory. I don't know what to do about that.
2152 * But I don't think it's too important. The manual lies when
2153 * it says access() is useful in setuid programs.
2155 if (access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2156 croak("Permission denied");
2158 /* If we can swap euid and uid, then we can determine access rights
2159 * with a simple stat of the file, and then compare device and
2160 * inode to make sure we did stat() on the same file we opened.
2161 * Then we just have to make sure he or she can execute it.
2164 struct stat tmpstatbuf;
2168 setreuid(euid,uid) < 0
2171 setresuid(euid,uid,(Uid_t)-1) < 0
2174 || getuid() != euid || geteuid() != uid)
2175 croak("Can't swap uid and euid"); /* really paranoid */
2176 if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2177 croak("Permission denied"); /* testing full pathname here */
2178 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2179 tmpstatbuf.st_ino != statbuf.st_ino) {
2180 (void)PerlIO_close(rsfp);
2181 if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */
2183 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2184 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2185 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2186 (long)statbuf.st_dev, (long)statbuf.st_ino,
2187 SvPVX(GvSV(curcop->cop_filegv)),
2188 (long)statbuf.st_uid, (long)statbuf.st_gid);
2189 (void)my_pclose(rsfp);
2191 croak("Permission denied\n");
2195 setreuid(uid,euid) < 0
2197 # if defined(HAS_SETRESUID)
2198 setresuid(uid,euid,(Uid_t)-1) < 0
2201 || getuid() != uid || geteuid() != euid)
2202 croak("Can't reswap uid and euid");
2203 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2204 croak("Permission denied\n");
2206 #endif /* HAS_SETREUID */
2207 #endif /* IAMSUID */
2209 if (!S_ISREG(statbuf.st_mode))
2210 croak("Permission denied");
2211 if (statbuf.st_mode & S_IWOTH)
2212 croak("Setuid/gid script is writable by world");
2213 doswitches = FALSE; /* -s is insecure in suid */
2215 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2216 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2217 croak("No #! line");
2218 s = SvPV(linestr,na)+2;
2220 while (!isSPACE(*s)) s++;
2221 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2222 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2223 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2224 croak("Not a perl script");
2225 while (*s == ' ' || *s == '\t') s++;
2227 * #! arg must be what we saw above. They can invoke it by
2228 * mentioning suidperl explicitly, but they may not add any strange
2229 * arguments beyond what #! says if they do invoke suidperl that way.
2231 len = strlen(validarg);
2232 if (strEQ(validarg," PHOOEY ") ||
2233 strnNE(s,validarg,len) || !isSPACE(s[len]))
2234 croak("Args must match #! line");
2237 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2238 euid == statbuf.st_uid)
2240 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2241 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2242 #endif /* IAMSUID */
2244 if (euid) { /* oops, we're not the setuid root perl */
2245 (void)PerlIO_close(rsfp);
2248 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2250 croak("Can't do setuid\n");
2253 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2255 (void)setegid(statbuf.st_gid);
2258 (void)setregid((Gid_t)-1,statbuf.st_gid);
2260 #ifdef HAS_SETRESGID
2261 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2263 setgid(statbuf.st_gid);
2267 if (getegid() != statbuf.st_gid)
2268 croak("Can't do setegid!\n");
2270 if (statbuf.st_mode & S_ISUID) {
2271 if (statbuf.st_uid != euid)
2273 (void)seteuid(statbuf.st_uid); /* all that for this */
2276 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2278 #ifdef HAS_SETRESUID
2279 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2281 setuid(statbuf.st_uid);
2285 if (geteuid() != statbuf.st_uid)
2286 croak("Can't do seteuid!\n");
2288 else if (uid) { /* oops, mustn't run as root */
2290 (void)seteuid((Uid_t)uid);
2293 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2295 #ifdef HAS_SETRESUID
2296 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2302 if (geteuid() != uid)
2303 croak("Can't do seteuid!\n");
2306 if (!cando(S_IXUSR,TRUE,&statbuf))
2307 croak("Permission denied\n"); /* they can't do this */
2310 else if (preprocess)
2311 croak("-P not allowed for setuid/setgid script\n");
2312 else if (fdscript >= 0)
2313 croak("fd script not allowed in suidperl\n");
2315 croak("Script is not setuid/setgid in suidperl\n");
2317 /* We absolutely must clear out any saved ids here, so we */
2318 /* exec the real perl, substituting fd script for scriptname. */
2319 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2320 PerlIO_rewind(rsfp);
2321 lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2322 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2323 if (!origargv[which])
2324 croak("Permission denied");
2325 origargv[which] = savepv(form("/dev/fd/%d/%s",
2326 PerlIO_fileno(rsfp), origargv[which]));
2327 #if defined(HAS_FCNTL) && defined(F_SETFD)
2328 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2330 execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2331 croak("Can't do setuid\n");
2332 #endif /* IAMSUID */
2334 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2335 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2337 Fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2338 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2340 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2343 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2344 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2345 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2346 /* not set-id, must be wrapped */
2352 find_beginning(void)
2354 register char *s, *s2;
2356 /* skip forward in input to the real script? */
2360 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2361 croak("No Perl script found in input\n");
2362 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2363 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2365 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2367 while (*s == ' ' || *s == '\t') s++;
2369 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2370 if (strnEQ(s2-4,"perl",4))
2372 while (s = moreswitches(s)) ;
2374 if (cddir && chdir(cddir) < 0)
2375 croak("Can't chdir to %s",cddir);
2383 uid = (int)getuid();
2384 euid = (int)geteuid();
2385 gid = (int)getgid();
2386 egid = (int)getegid();
2391 tainting |= (uid && (euid != uid || egid != gid));
2395 forbid_setid(char *s)
2398 croak("No %s allowed while running setuid", s);
2400 croak("No %s allowed while running setgid", s);
2407 curstash = debstash;
2408 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2410 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2411 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2412 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2413 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2414 sv_setiv(DBsingle, 0);
2415 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2416 sv_setiv(DBtrace, 0);
2417 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2418 sv_setiv(DBsignal, 0);
2419 curstash = defstash;
2423 init_stacks(ARGSproto)
2426 mainstack = curstack; /* remember in case we switch stacks */
2427 AvREAL_off(curstack); /* not a real array */
2428 av_extend(curstack,127);
2430 stack_base = AvARRAY(curstack);
2431 stack_sp = stack_base;
2432 stack_max = stack_base + 127;
2434 cxstack_max = 8192 / sizeof(PERL_CONTEXT) - 2; /* Use most of 8K. */
2435 New(50,cxstack,cxstack_max + 1,PERL_CONTEXT);
2438 New(50,tmps_stack,128,SV*);
2444 * The following stacks almost certainly should be per-interpreter,
2445 * but for now they're not. XXX
2449 markstack_ptr = markstack;
2451 New(54,markstack,64,I32);
2452 markstack_ptr = markstack;
2453 markstack_max = markstack + 64;
2459 New(54,scopestack,32,I32);
2461 scopestack_max = 32;
2467 New(54,savestack,128,ANY);
2469 savestack_max = 128;
2475 New(54,retstack,16,OP*);
2486 Safefree(tmps_stack);
2493 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2502 subname = newSVpv("main",4);
2506 init_predump_symbols(void)
2513 sv_setpvn(THREADSV(find_threadsv("\"")), " ", 1);
2515 sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1);
2516 #endif /* USE_THREADS */
2518 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2519 GvMULTI_on(stdingv);
2520 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2521 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2523 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2525 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2527 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2529 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2531 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2533 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2534 GvMULTI_on(othergv);
2535 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2536 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2538 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2540 statname = NEWSV(66,0); /* last filename we did stat on */
2543 osname = savepv(OSNAME);
2547 init_postdump_symbols(register int argc, register char **argv, register char **env)
2554 argc--,argv++; /* skip name of script */
2556 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2559 if (argv[0][1] == '-') {
2563 if (s = strchr(argv[0], '=')) {
2565 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2568 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2571 toptarget = NEWSV(0,0);
2572 sv_upgrade(toptarget, SVt_PVFM);
2573 sv_setpvn(toptarget, "", 0);
2574 bodytarget = NEWSV(0,0);
2575 sv_upgrade(bodytarget, SVt_PVFM);
2576 sv_setpvn(bodytarget, "", 0);
2577 formtarget = bodytarget;
2580 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2581 sv_setpv(GvSV(tmpgv),origfilename);
2582 magicname("0", "0", 1);
2584 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2585 sv_setpv(GvSV(tmpgv),origargv[0]);
2586 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2588 (void)gv_AVadd(argvgv);
2589 av_clear(GvAVn(argvgv));
2590 for (; argc > 0; argc--,argv++) {
2591 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2594 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2598 hv_magic(hv, envgv, 'E');
2599 #ifndef VMS /* VMS doesn't have environ array */
2600 /* Note that if the supplied env parameter is actually a copy
2601 of the global environ then it may now point to free'd memory
2602 if the environment has been modified since. To avoid this
2603 problem we treat env==NULL as meaning 'use the default'
2608 environ[0] = Nullch;
2609 for (; *env; env++) {
2610 if (!(s = strchr(*env,'=')))
2613 #if defined(WIN32) || defined(MSDOS)
2616 sv = newSVpv(s--,0);
2617 (void)hv_store(hv, *env, s - *env, sv, 0);
2619 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2620 /* Sins of the RTL. See note in my_setenv(). */
2621 (void)putenv(savepv(*env));
2625 #ifdef DYNAMIC_ENV_FETCH
2626 HvNAME(hv) = savepv(ENV_HV_NAME);
2630 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2631 sv_setiv(GvSV(tmpgv), (IV)getpid());
2640 s = getenv("PERL5LIB");
2644 incpush(getenv("PERLLIB"), FALSE);
2646 /* Treat PERL5?LIB as a possible search list logical name -- the
2647 * "natural" VMS idiom for a Unix path string. We allow each
2648 * element to be a set of |-separated directories for compatibility.
2652 if (my_trnlnm("PERL5LIB",buf,0))
2653 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2655 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2659 /* Use the ~-expanded versions of APPLLIB (undocumented),
2660 ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB
2663 incpush(APPLLIB_EXP, FALSE);
2667 incpush(ARCHLIB_EXP, FALSE);
2670 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2672 incpush(PRIVLIB_EXP, FALSE);
2675 incpush(SITEARCH_EXP, FALSE);
2678 incpush(SITELIB_EXP, FALSE);
2680 #ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */
2681 incpush(OLDARCHLIB_EXP, FALSE);
2685 incpush(".", FALSE);
2689 # define PERLLIB_SEP ';'
2692 # define PERLLIB_SEP '|'
2694 # define PERLLIB_SEP ':'
2697 #ifndef PERLLIB_MANGLE
2698 # define PERLLIB_MANGLE(s,n) (s)
2702 incpush(char *p, int addsubdirs)
2704 SV *subdir = Nullsv;
2705 static char *archpat_auto;
2712 if (!archpat_auto) {
2713 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2714 + sizeof("//auto"));
2715 New(55, archpat_auto, len, char);
2716 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2718 for (len = sizeof(ARCHNAME) + 2;
2719 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2720 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2725 /* Break at all separators */
2727 SV *libdir = newSV(0);
2730 /* skip any consecutive separators */
2731 while ( *p == PERLLIB_SEP ) {
2732 /* Uncomment the next line for PATH semantics */
2733 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2737 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2738 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2743 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2744 p = Nullch; /* break out */
2748 * BEFORE pushing libdir onto @INC we may first push version- and
2749 * archname-specific sub-directories.
2752 struct stat tmpstatbuf;
2757 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2759 while (unix[len-1] == '/') len--; /* Cosmetic */
2760 sv_usepvn(libdir,unix,len);
2763 PerlIO_printf(PerlIO_stderr(),
2764 "Failed to unixify @INC element \"%s\"\n",
2767 /* .../archname/version if -d .../archname/version/auto */
2768 sv_setsv(subdir, libdir);
2769 sv_catpv(subdir, archpat_auto);
2770 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2771 S_ISDIR(tmpstatbuf.st_mode))
2772 av_push(GvAVn(incgv),
2773 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2775 /* .../archname if -d .../archname/auto */
2776 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2777 strlen(patchlevel) + 1, "", 0);
2778 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2779 S_ISDIR(tmpstatbuf.st_mode))
2780 av_push(GvAVn(incgv),
2781 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2784 /* finally push this lib directory on the end of @INC */
2785 av_push(GvAVn(incgv), libdir);
2788 SvREFCNT_dec(subdir);
2792 static struct perl_thread *
2795 struct perl_thread *thr;
2798 Newz(53, thr, 1, struct perl_thread);
2799 curcop = &compiling;
2800 thr->cvcache = newHV();
2801 thr->threadsv = newAV();
2802 /* thr->threadsvp is set when find_threadsv is called */
2803 thr->specific = newAV();
2804 thr->errhv = newHV();
2805 thr->flags = THRf_R_JOINABLE;
2806 MUTEX_INIT(&thr->mutex);
2807 /* Handcraft thrsv similarly to mess_sv */
2808 New(53, thrsv, 1, SV);
2809 Newz(53, xpv, 1, XPV);
2810 SvFLAGS(thrsv) = SVt_PV;
2811 SvANY(thrsv) = (void*)xpv;
2812 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2813 SvPVX(thrsv) = (char*)thr;
2814 SvCUR_set(thrsv, sizeof(thr));
2815 SvLEN_set(thrsv, sizeof(thr));
2816 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2818 curcop = &compiling;
2821 MUTEX_LOCK(&threads_mutex);
2826 MUTEX_UNLOCK(&threads_mutex);
2828 #ifdef HAVE_THREAD_INTERN
2829 init_thread_intern(thr);
2832 #ifdef SET_THREAD_SELF
2833 SET_THREAD_SELF(thr);
2835 thr->self = pthread_self();
2836 #endif /* SET_THREAD_SELF */
2840 * These must come after the SET_THR because sv_setpvn does
2841 * SvTAINT and the taint fields require dTHR.
2843 toptarget = NEWSV(0,0);
2844 sv_upgrade(toptarget, SVt_PVFM);
2845 sv_setpvn(toptarget, "", 0);
2846 bodytarget = NEWSV(0,0);
2847 sv_upgrade(bodytarget, SVt_PVFM);
2848 sv_setpvn(bodytarget, "", 0);
2849 formtarget = bodytarget;
2850 thr->errsv = newSVpv("", 0);
2853 #endif /* USE_THREADS */
2856 call_list(I32 oldscope, AV *list)
2859 line_t oldline = curcop->cop_line;
2864 while (AvFILL(list) >= 0) {
2865 CV *cv = (CV*)av_shift(list);
2874 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2875 (void)SvPV(atsv, len);
2878 curcop = &compiling;
2879 curcop->cop_line = oldline;
2880 if (list == beginav)
2881 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2883 sv_catpv(atsv, "END failed--cleanup aborted");
2884 while (scopestack_ix > oldscope)
2886 croak("%s", SvPVX(atsv));
2894 /* my_exit() was called */
2895 while (scopestack_ix > oldscope)
2898 curstash = defstash;
2900 call_list(oldscope, endav);
2902 curcop = &compiling;
2903 curcop->cop_line = oldline;
2905 if (list == beginav)
2906 croak("BEGIN failed--compilation aborted");
2908 croak("END failed--cleanup aborted");
2914 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2919 curcop = &compiling;
2920 curcop->cop_line = oldline;
2933 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2934 thr, (unsigned long) status));
2935 #endif /* USE_THREADS */
2944 STATUS_NATIVE_SET(status);
2951 my_failure_exit(void)
2954 if (vaxc$errno & 1) {
2955 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2956 STATUS_NATIVE_SET(44);
2959 if (!vaxc$errno && errno) /* unlikely */
2960 STATUS_NATIVE_SET(44);
2962 STATUS_NATIVE_SET(vaxc$errno);
2966 STATUS_POSIX_SET(errno);
2967 else if (STATUS_POSIX == 0)
2968 STATUS_POSIX_SET(255);
2977 register PERL_CONTEXT *cx;
2986 (void)UNLINK(e_tmpname);
2987 Safefree(e_tmpname);
2991 if (cxstack_ix >= 0) {